Various Perspectives for Characterising the Web: - Locating Resources: The way people find things on the Web is evolving from simple free text and keyword search to more sophisticated semantic techniques both for search and navigation. - Users: Web resources are evolving from being primarily intended for human consumption to being intended for use both by humans and machines . - Web Tasks and Services: The Web is evolving from being primarily a place to find things to being a place to do things as well [Smith 2001].